jet@kubuntu:~$ deb-get remove --remove-repo keepassxc
Reading package lists...
Building dependency tree...
Reading state information...
The following packages will be REMOVED:
  keepassxc libargon2-1 libqt5concurrent5t64 libzxcvbn0
0 upgraded, 0 newly installed, 4 to remove and 3 not upgraded.
After this operation, 35.9 MB disk space will be freed.
(Reading database ... 239475 files and directories currently installed.)
Removing keepassxc (2.7.10-1ppa2~oracular1) ...
Removing libargon2-1:amd64 (0~20190702+dfsg-4build1) ...
Removing libqt5concurrent5t64:amd64 (5.15.15+dfsg-1ubuntu1) ...
Removing libzxcvbn0:amd64 (2.5+dfsg-2) ...
Processing triggers for hicolor-icon-theme (0.18-1) ...
Processing triggers for libc-bin (2.40-1ubuntu3.1) ...
Processing triggers for man-db (2.12.1-3) ...
Processing triggers for shared-mime-info (2.4-5) ...
Processing triggers for desktop-file-utils (0.27-2build1) ...
  [+] Removing /usr/share/keyrings/keepassxc-archive-keyring.gpg
  [+] Removing /etc/apt/sources.list.d/keepassxc.list

jet@kubuntu:~$ ls /usr/share/keyrings
phoerious-ubuntu-keepassxc-oracular-archive-keyring.gpg  ubuntu-cloudimage-keyring.gpg       ubuntu-pro-anbox-cloud.gpg  ubuntu-pro-esm-apps.gpg   ubuntu-pro-fips-preview.gpg
ubuntu-archive-keyring.gpg                               ubuntu-cloudimage-removed-keys.gpg  ubuntu-pro-cc-eal.gpg       ubuntu-pro-esm-infra.gpg  ubuntu-pro-realtime-kernel.gpg
ubuntu-archive-removed-keys.gpg                          ubuntu-master-keyring.gpg           ubuntu-pro-cis.gpg          ubuntu-pro-fips.gpg       ubuntu-pro-ros.gpg

jet@kubuntu:~$ ls /etc/apt/sources.list.d/
phoerious-ubuntu-keepassxc-oracular.list  ubuntu.sources